A simple will, if that is all you need, can be prepared very quickly and inexpensively. You may also be able to add your wife to the stock certificates as a joint owner with right of survivorship, which would vest the stock into her name immediately upon your death. Call your broker.
If you are 95 and own stocks and want to protect your wife, I would consult an estate planning attorney in your area. You should be able to have a simple will drawn up fairly cheaply and quickly. Ask for recommendations from family and friends. Good luck!